Abstract
1. By means of Cardiotachograph the respiratory arrhythmias ofhealthy men were observed repeatedly during a period of about one year, especial attention being paid to its relation to the cardiac rate.
2. The last mentioned relation remained to be characteristic to each individual throughout the entire course of the experimental period.
3. No definite tendency to seasonal variations in the respiratory arrhythmia, common to all individuals, could be ascertained.
Part of the expenses of this work was defrayed by a Grant from the Foundation for Promotion of Scientific Research of the Education Department of Japan. K. Matsuda.
